metaspu: have it compiled under gcc too

Based on patches from Tobias Jakobi (liquidacid) in #3250391

desmume/src/metaspu/SndOut.h

@@ -83,7 +83,7 @@ static const int SndOutVolumeShift = 0;
 ////static const int SampleRate = 48000;
 //static const int SampleRate = 44100;
 //edit - nitsuja: make it use the global sample rate define
-#include "..\SPU.h"
+#include "../SPU.h"
 static const int SampleRate = DESMUME_SAMPLE_RATE;
 
 extern int FindOutputModuleById( const wchar_t* omodid );

desmume/src/metaspu/Timestretcher.cpp

@@ -18,12 +18,18 @@
 //#include "Global.h"
 #include <math.h>
 #include "types.h"
-#include "SoundTouch/SoundTouch.h"
 #include "SndOut.h"
 //#include "SoundTouch/WavFile.h"
 
-#include "win32/Dialogs.h"
+#ifdef HAVE_LIBSOUNDTOUCH
+#include <SoundTouch.h>
+#else
+#include "SoundTouch/SoundTouch.h"
+#endif
 
+#ifdef _WINDOWS
+#include "win32/Dialogs.h"
+#endif
 
 
 static soundtouch::SoundTouch* pSoundTouch = NULL;
@@ -313,7 +319,9 @@ void SndBuffer::soundtouchInit()
 	pSoundTouch->setSetting( SETTING_USE_QUICKSEEK, 0 );
 	pSoundTouch->setSetting( SETTING_USE_AA_FILTER, 0 );
 
+#ifdef _WINDOWS
 	SoundtouchCfg::ApplySettings( *pSoundTouch );
+#endif
 
 	pSoundTouch->setTempo(1);
 

desmume/src/metaspu/metaspu.cpp

@@ -24,8 +24,7 @@
 #include <assert.h>
 
 //for pcsx2 method
-//(havent bothered to get it compiling in gcc yet)
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(HAVE_LIBSOUNDTOUCH)
 #include "SndOut.h"
 #endif
 
@@ -466,7 +465,7 @@ private:
 }; //NitsujaSynchronizer
 
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(HAVE_LIBSOUNDTOUCH)
 class PCSX2Synchronizer : public ISynchronizingAudioBuffer
 {
 public:
@@ -513,9 +512,9 @@ ISynchronizingAudioBuffer* metaspu_construct(ESynchMethod method)
 	{
 	case ESynchMethod_N: return new NitsujaSynchronizer();
 	case ESynchMethod_Z: return new ZeromusSynchronizer();
-	#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(HAVE_LIBSOUNDTOUCH)
 	case ESynchMethod_P: return new PCSX2Synchronizer();
-	#endif
+#endif
 	default: return NULL;
 	}
 }